The cover of Forry Ackerman's Famous Monsters of Filmland #29 featured The Flesh Eaters on the cover. I had this issue when I was a kid. Seeing "Jerry Lewis" next to the agonized face, I thought that it was Lewis and he was in the movie. [The face looked a little like him.] I think Basil Gogos painted it. Here's a link to the FM cover.